package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /*新增套餐
     * */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //向套餐插入一条数据
        setmealMapper.insert(setmeal);

        //获取insert语句生成的主键值
        Long setmealId = setmeal.getId();


        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && !setmealDishes.isEmpty()){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealId);
        });
            //向菜品表插入n条数据
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /*
     * 套餐分页查询
     * */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }
    /*
     * 删除套餐
     * */

    public void deleteBatch(List<Long> ids) {
        //判断当前套餐是否能够删除--是否存在起售的套餐
        for (Long id : ids) {
            Setmeal setmeal=setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE){
                //当前套餐处于启售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        for (Long id : ids) {
            //根据套餐id集合批量删除菜品数据
            setmealMapper.deleteById(id);
            //根据套餐id集合批量删除关联的菜品数据
            setmealDishMapper.deleteBySetmealIds(id);
        }

    }

    @Override
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    @Override
    public void updateWithDish(SetmealDTO setmealDTO) {
            Setmeal setmeal=new Setmeal();
            BeanUtils.copyProperties(setmealDTO,setmeal);
            //修改套餐表基本信息
            setmealMapper.update(setmeal);
            //删除原有的菜品数据
            setmealDishMapper.deleteBySetmealIds(setmealDTO.getId());
            //重新插入菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size()>0){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealDTO.getId());
            });
            //向菜品表插入n条数据
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        Setmeal setmeal = new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);

        setmealMapper.startOrStop(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
